146 U.S. NATIONAL MUSEUM BULLETIN 260 



those of StegocepkaJoides auratus Sars (1895, pi. 70, fig. 3), unlike 

 those of P. pajareUa^ and the third pleonal epimeron is prolonged 

 posteriorly. 



Phi/ppsiella abyssicola Oldevig (1959), P. longlcornis Gurjanova 

 (1962), and P. mpoma J. L. Barnard (1961, 1962a) have fifth pereo- 

 pods like those of P. minwia and article 5 of gnathopod 1 on P. 

 longicornis and P. nipoma is stout. Phippsiella nipoma has a shorter 

 article 6 of gnathopod 2 than that reconstructed for P. pajareUa. 



Phippsiella rostrata K. H. Barnard (1932) has a large rostrum. 



Phippsiella viscaina, new species 



Figure 72 



Diagnosis. — Rostrum obsolete ventrally but front of head bearing 

 a keel (see fig. 72 /') ; eyes absent; accessory flagellum uniarticulate ; 

 upper lip, mandibles, lower lip, and maxilla 2 like those of Stegoce- 

 p>holus infatus Kr0yer as figured by Sars (1895, pi. 69) ; maxilliped 

 and maxilla 1 figured herein ; coxa 4 narrow in comparison to that of 

 P. similis (Sars, 1895), coxa 5 with posterior lobe subacute ventrally; 

 gnathopods similar to P. similis but fifth articles more slender; article 

 2 of pereopod 4 tapering posterodistally, corner rounded, article 2 of 

 pereopod 5 rather slender for genus, tapering distally, lobe subacute, 

 extending beyond end of article 3, posterior margin with large serra- 

 tions; pleonal epimera with minute points at postero ventral corners, 

 epimeron 3 smooth posteriorly, with strong point marked below with 

 notch and secondary point; uropods 1 and 2 with multispinose rami, 

 outer ramus of uropod 3 uniarticulate; telsonic cleft slightly exceeding 

 half. 



HoLOTYPE.— AHF No. 6135, male, 3.3 mm. 



Type-locality.— Station 7324, 27°38'00" N, 115°16'16" W, 791- 

 842 m, Jan. 2, 1961. 



Material. — Five specimens from the type-locality. 



Relationship. — The species of this genus differ among themselves 

 by rather weakly developed characteristics. These are the shapes of 

 the third pleonal epimera and the posterior lobes of article 2 on 

 pereopod 5. The combination of a slightly pointed posterodistal lobe 

 on article 2 of pereopod 5 plus a notch at the posteroventral corner 

 of pleonal epimeron 3 are unique for Phippsiella and characterize P. 

 viscaina. Pereopod 5 of P. viscaina is similar to that of P. nipoma 

 J. L. Barnard (1961) and pleonal epimeron 3 is similar to that of 

 P. kergueleni Schellenberg (1926b) but otherwise no judgment as to 

 affinities of the new species can be made. 



